% 22 Feb 2021 23:19:09
\documentclass{article}
\begin{document}

{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{3}{c}}
\hline\hline
            &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}\\
            &\multicolumn{1}{c}{Pandemics}&\multicolumn{1}{c}{Wars}&\multicolumn{1}{c}{p-value}\\
\hline
$ h = 0 $   &        0.14\sym{*}  &        0.05         &        0.36         \\
            &      (0.09)         &      (0.06)         &                     \\
[1em]
$ h = 10 $  &        1.63         &       -1.01         &        0.23         \\
            &      (1.82)         &      (1.21)         &                     \\
[1em]
$ h = 20 $  &        5.09\sym{**} &       -0.87         &        0.05         \\
            &      (2.53)         &      (1.69)         &                     \\
[1em]
$ h = 30 $  &        4.32         &        0.45         &        0.29         \\
            &      (2.99)         &      (1.99)         &                     \\
[1em]
$ h = 40 $  &        7.95\sym{**} &        1.37         &        0.12         \\
            &      (3.48)         &      (2.31)         &                     \\
\hline
Observations&         522         &                     &                     \\
\hline\hline
\multicolumn{4}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{4}{l}{\footnotesize \sym{*} \(p<0.1\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
}

\end{document}

